In some embodiments, a method includes in response to an integration tag included in a webpage at a first user interface being executed at a mobile device, receiving a mobile device identifier and a request to retrieve a purchase identifier. The method includes sending a first signal causing a frame to be provided within the webpage at the first user interface. The method includes in response to a first user input, receiving a Hyper Text Transfer Protocol (HTTP) POST request and determining a uniform resource identifier (URI). The method includes retrieving purchase information and sending a HTTP response message including the URI of the second user interface and the purchase information to deeplink to the second user interface and to cause the second user interface to be rendered at the mobile device with the purchase information pre-populated in an input field of a text message.